Pressure vessel for solid carbon dioxide



March '28, 1933. A. J. CORDREY PRESSURE VESSEL FOR SOLID CARBON DIOXIDE Filed Mrch 12, 1951v Patented Mar. 28,

UNITED, STATES PATENT OFFICE ALION' J. OOBDBEY, OI DETROIT, MICHIGAN, ASSIGNOB TO ZERO ICE OOBPOBATIOH,

A CORPORATION OF IICHIGAN PRESSURE VESSEL FOR SOLID CARBON DIOXIDE Application filed larch 12, 1931. Serial'lo. 528,112.

This invention-relates to apparatus for producing carbonic acid for miscellaneous use wherever desired in liquid or gaseous form, and contemplates liquefying carbon dioxide supplied in solid form and maintainit under heavy pressure ready for use.

t is a well known fact that solid carbon dioxide, when exposed to atmos herio temperature and pressure, will su limate or gasify, without assing through the liquid phase, but when t e pressure is increased sufciently, it will liquefy, the li uid occupying about fiftypercent more v0 ume than the equivalent weight in solid form, depending upon'the density of the solid, i. e., the extent to which it has been compressed. Pressure vessels heretofore utilized for liquefying filling opening.

solid carbon dioxide have presented a source of danger from the possibility of overcharging them with the solid substance, giving rise to excessive pressure due to liquefaction of more carbon dioxide than the containers would hold. Y

My invention aims to provide a suitable pressure vessel for receiving and storing and liquefying solid carbon dioxide, and in-.

sure, and fitted interiorly with a rack for i us through the charging opening;

sup orting the solid carbon dioxide prior to liquefaction.

Further details of the invention appear from the following description of the illustrative embodiment shown in the accompanying drawing, wherein Fig. 1 is an axial sectional view of a pressure vesel as fitted for use;

Fig. 2 is a top view of the same;

Fig. 3' is a plan view of the closure memher, with the yoke turned to permit it to pass vide a gas tight seal.

Fig. 4 is a cross-section on the line 4-4 in Fig. 1;

Fig. 5 is a perspective view of the supporting rack prior to its insertion in the pressure vessel.

In the form illustrated, the pressure vessel 11 has a seamless tubular body of steel or other tough strong metal or alloy, closed in at the lower end to a point, and provided with a threaded opening for an outlet fitting 12, which may befurnished with a valve 13 for drawing oil the liquefied carbon dioxide as desired. Near the upper end of the pressure vessel are two threaded openings, one of which may be provided with an outlet fitting 14 for a pipe for drawing 'ofl carbon diox1de gas, and the other fitted with a simifar outlet 15 for a gauge if desired. In case either is not needed for use, it may be closed by a plug or cap 16. l

The top end of the pressure vessel is open to permit charging, and provided with a suitable closure. In the form of the invention illustrated, the upper end of the tubular body has an inwardly disposed flange 17 against which the closure member 18 is retained by means of a clamp bolt 19, and spring yoke 20.

A gasket 21 is arranged between the edge portion 22 of the closure and the flange 17.

The closure opening and closure are preferably elliptical to permit the closure to be withdrawn when a charge is to be introduced, as may be quicky done by loosening it sufliciently to free the ends of the yoke 20, which may then be swung parallel'with the longer axis of the opening (as shown in Fig. 3 and thereupon the closure may be tilted si ewise and turned endwise to pass between the sides of the opening. After the vessel has been charged, the closure may be inserted endwise through the opening, turned at right angles and swung parallel to the longer axis of the opening, the. yoke turned to span the opening across its shorter sides and then clamped in placeto draw the closure tight against the flange 17 and compress the gasket 21 to pro- A rack 23. preferably made of metal rings and L-shape bars of steel or wrought iron, or similar bendable but not easily breakable material, is provided for supporting the charge above the lower end of the pressure vessel at apoint about athird way of the length of the body. The diameter of the ring members 24, to which the side bars are secured, is less than the smallest dimension of the top' opening, to permit the rack to be placed in the pressure receptacle. The bent ends 25 of the L-shape bars are disposed radially and project over the upper ring member 24, and the outwardly bent ends may be heated and straightened sufiiciently to pass through the opening, as illustrated in 5; and the reek is in niece these bent e: ds may be strsightened "'e stillhot, a {v f F l,

ins i w pressu e i-rein. ESEHTB vess a. embodying the invent r may lacs st he piece of use, and periodtee. ically charged when exhausted of pressure, ith solid carbon dioxide in safe amounts, no special precautions against overcharging being necessary. Such vessels may be readily flushed out and cleaned without removing the rack, and. removal of the rack by cereless or irresponsible persons is prevented. The compressed blocks of solid carbon dioxide are procurable commercially in sizes and weights convenient for charging such pressure vessels.

lhe invention is not restricted to the form, materials and construction of the several parts illustrated; but what I cleim and desire to secure by Letters Pstent is as Lollows:

1. A. pressure vessel for liqnefying solid carbon dioxide, comprising an elongated hob low body having an end charging opening of lesser size than the interior of the body, and a reek in said vessel of substantially greater length then width, the width of said rack being greater then the size oi said opening whereby it cannot be removed irom said pressure vessel without deformation.

2. A pressure vessel for liquefying solid carbon dioxide comprising an elongated hollow body having an end charging opening of lesser size than the interior of the bod and a rack in said vessel composed of lengtiiwise and radial bars and encircling rings, said rack being of substantially greater length than width, and length of said radial bars being greater than the diameter of said rings and securely welded thereto to provide projectiog ends adapted to be bent when heated to permit said rack to pass through said charging opening.

3. A pressure vessel for liquefying solid carbon dioxide and the like comprising a body portion of tubular form, closed at one end and provided with an integral inwardly turned flange at the other end, a rack within said pressure vessel to support the solid-car- 11 10 .zi. 1 is. s s. irons being winidrswn b mu i said openl members prog'ecting outwari per one of rings and thereto to provide projecting ends constituting a, support oi? great/er diameter than said charging opening and adapted to be bent when heated to permit said rack to pass through. said opening.

In testimony whereof, I have signed my name to this specification.

ALBION J. CORDEEY. 

